chemical engineering MCQs – Page 66

Practise multiple-choice questions from chemical engineering for competitive examinations and subject revision. Review each marked answer and report any item that may be outdated or unclear.

chemical engineering Mcqs
1301. Drinking (potable) water treatment does not involve __________________?
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A. Softening

B. Coagulation

C. Disinfection

D. Sedimentation

1302. Pick out the wrong statement?
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A. Net sales realisation (NSR) = Gross sales selling expenses

B. At breakeven point, NSR is more than the total production cost

C. Gross margin = net income net expenditure

D. Net profit = Gross margin depreciation interest

1303. Which of the following is a co-product during the manufacture of caustic soda by electrolysis of brine ?
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A. NaHCO3

B. H2

C. Na2CO3

D. None of these

1304. Pick out the wrong statement?
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A. Return on equity = profit after tax/net worth

B. Working capital turnover ratio = sales/net working capital

C. Total cost of production is more than net sales realisation (NSR) at breakeven point

D. Net worth means paid up share capital and reserve & surplus (i.e. shareholders equity)

1305. In primitive days, _____________ was being manufactured by Leblanc Process ?
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A. Calcium carbide

B. Alum

C. Washing soda

D. Soda ash
1306. In multistage equilibrium conversion of SO2 to SO3 (2SO2 + O2 ? 2SO3), the reverse reaction becomes appreciable at a temperature of 550 C. The percentage equilibrium conversion of SO2 to SO3 can be increased by ?
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A. Maintaining low temperature & pressure in the converter

B. Removing some quantity of SO3 during intermediate stage

C. Putting more quantity of V2O5 catalyst in the converter

D. Increasing the oxygen concentration

1307. Which of the following is not a food additive ?
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A. Ammonium chloride

B. Invertage

C. Citric acid

D. Benzoyl peroxide

1308. Black liquor is converted into white liquor by __________________________?
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A. Evaporation and burning the concentrate followed by causticisation of products

B. Multi-effect evaporation only

C. Selective liquid extraction

D. Extractive distillation

1309. RDX (an explosive), which is more sensitive but less toxic than TNT, is chemically____________________?
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A. Cyclo tetramethylene tetranitramine

B. Cyclo trimethylene trinitramine

C. Trinitro resorcinol

D. Trinitrobenzene

1310. Detergent is produced by the sulphonation of dodecyl benzene, which is an ________________ reaction?
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A. Endothermic

B. Exothermic

C. Irreversible

D. Both B. and C.
1311. Bakelite is chemically known as_____________________?
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A. Polyurethane

B. Polyvinyl chloride (PVC)

C. Phenol formaldehyde

D. Polybutadiene

1312. Calgon used in water treatment is chemically ____________________?
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A. Sodium hexametaphosphate

B. Sodium phosphate

C. Calcium phosphate

D. Tricresyl phosphate

1313. ______________ is an ore concentrating metallurgical process involving a chemical change?
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A. Electromagnetic separation

B. Roasting

C. Froth floatation

D. None of these

1314. A unit operation is exemplified by the process of ___________________?
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A. Combustion

B. Nitration

C. Desorption

D. Reduction

1315. Wax is a___________________?
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A. Mixture of glycerides of fatty acids

B. Mixture of glycerides

C. Liquid at room temperature

D. Mixture of esters of polyhydric alcohols excepting glycerine
1316. Titanium dioxide is a/an ___________________ colour pigment?
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A. Blue

B. Yellow

C. Black

D. White
1317. Which of the following processes is absent in glass manufacturing process ?
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A. Shaping or forming

B. Sintering

C. Melting

D. Annealing

1318. The most economical pulp for the production of newsprint would be the _____________________ pulp?
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A. Sulphite

B. Ground-wood

C. Semi-chemical

D. Sulphate

1319. 90% of the caprolactam is converted to nylon-6 on its condensation polymerisation in the reactor maintained at _____________ C ?
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A. < 0

B. 250-280

C. 10-30

D. 500-600

1320. Pick out the wrong statement ?
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A. Water gas is called blue gas because of the color of the flame, when it is burnt

B. Strongly caking coal should not be used in the Lurgi gasifier

C. Gaseous fuels require less percentage of excess air for combustion as compared to liquid fuels

D. Acetylene gas cannot be used for illumination purpose